i forgot to write:
when i woke up laptop, entered password, {i do not remember, whether i
entered login (username) that time}, and i had come into new desktop
session, instead of saved (suspended) session.
then many these messages were appearing in syslog:
Dec 12 20:51:57 localhost at-spi2-registr[16774]: Could not open X display
Dec 12 20:51:57 localhost at-spi-bus-launcher[1051]:
dbus-daemon[1062]: Successfully activated service
'org.a11y.atspi.Registry'
Dec 12 20:51:57 localhost at-spi-bus-launcher[1051]: SpiRegistry
daemon is running with well-known name - org.a11y.atspi.Registry
Dec 12 20:51:57 localhost at-spi2-registr[16774]: AT-SPI: Cannot open
default display
Dec 12 20:51:57 localhost at-spi-bus-launcher[1051]:
dbus-daemon[1062]: Activating service name='org.a11y.atspi.Registry'
requested by ':1.39' (uid=1000 pid=16772 comm="xfce4-session ")
then i restarted machine, to stop them...
